我建议您将主题版本存储在数据库中，并将其与软件包版本进行比较，如果有差异，请在升级/安装操作中加载：

define( \'THEME_PREFIX_VERSION\', \'X.X\' );

/**
 * Run upgrade/install.
 */
function theme_prefix_install() {
    require_once dirname( __file__ ) . \'/install.php\';
}

if ( version_compare( get_option( \'theme_prefix_version\' ), THEME_PREFIX_VERSION, \'<\' ) )
    add_action( \'init\', \'theme_prefix_install\' );

if ( ! defined( \'THEME_PREFIX_VERSION\' ) )
    exit;

$version = get_option( \'theme_prefix_version\' );

if ( version_compare( $version, \'1.0\', \'<\' ) ) {
    // Upgrade code required for version 1.0
}


if ( version_compare( $version, \'1.1\', \'<\' ) ) {
    // Upgrade code required for version 1.1
}

// And so forth

// All updated, store current package version
update_option( \'theme_prefix_version\', THEME_PREFIX_VERSION );

仅为了运行升级而创建工作插件。代码在激活时运行，然后可以简单地再次停用，而不会影响运行时/性能：

<?php

/**
 * Plugin Name: Project Name Upgrader
 * Description: Activate to run one-time upgrades.
 * Version:     0.1
 * Author:      Author
 */

function project_name_upgrade() {
    // All your upgrade code
}

register_activation_hook( __file__, \'project_name_upgrade\' );